Plane-iron.



'Nb.746, 286. PATENTED 1130's, 190s.

J. w. OARLETON. 4

PLANE IRON.

, APPLICATION FILED 811F119, 1903.

no MODEL.

UNITED STATES Patented December s, 1903.

P T NT OFFICE.

JOHN W. CARLETON, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO UNIONMANUFACTURING COMPANY, OF NEW BRITAIN, CONNECTICUT, A COR- PORATION OFCONNECTICUT.

PLANE-IRON.

SPECIFICATION forming part of Letters Patent No. 746.286, dated December8, 1903. Application filed September 19, 1903. Serial No. 173,821. (Nomodel.)

T at whom it may concern:

Be it known that I, JOHN W. CARLETON, a citizen of the United States,residing at New Britain, in the county of Hartford and State I ofConnecticut, have invented certain new useful ImprovementsinPlane-Irons, of which the following is a specification.

My invention relates to improvements in plane irons or cutters; and theobject of my 1 improvement is to facilitate securing the bitadjustingbolt to the body of the cutting-bit or plane-iron.

In the accompanyingdrawings, Figurelisa plan view of my plane-iron. Fig.2 is a side elevation of the same. Fig. 3 is a reverse plan view of thesame. Fig. 4 is a detached side elevation of the adjusting-bolt with thenut removed. Fig. 5 isa plan View of the same.

A designates the cutting-bit, having the V usual longitudinal slot 6,within the lower end of which is the bolt 7, by which to connect thesaid cutting-bit with any ordinary devices for adjusting the said bitlongitudinally. This bolt has its head 8 projecting from the under sideof the bit and is provided with a slot 9 to reoeive'a projection of thelever or other device for adjusting the bitlongitudiually. A portion ofthe head is slabbed 0 off on opposite sides, as at 10, Figs. 4 and 5, tolet the said bolt-head into the slot 6 ofthe bit, with the saidslabbed-ofi portions acting in connection with the sides of the slot, toprevent the said bolt from rotating within the said slot. The end orbody of the bolt 7 is I screw-threaded and receives a nut 11, whichrests upon smooth surfaces on the upper broad side of the cutting-bit orplane-iron and by which out the said bolt may be ad- 40 justably securedat any desired position in the lower end of the said slot. provided witha screw-driver slot 12 to facilitate securing it in place. As shown, theperiphery of the said nut is also provided with a knurled surface tofacilitate turning the nut with ones fingers.

This nut is Upon each side of the slot 6, from its lower end upwardly apart of the length of the said slot, there is formed a roughened face13, Fig. 3, which may be simply a series of alter- 5o nate line-groovesand ridges extending from the edges of the slot 6 outwardly about thesame distance that thebolt-head 8 projects beyond the said edges. Theseroughened surfaces come under the nonrotating head of the bolt, which isdrawn firmly against them by tightening up the nut. This nut bears onsmooth surfaces, so that it turns smoothly when it is rotated to drawthe bolt-head against the roughened surfaces on the opposite broad sideof the cutting-bit, whereby the bolt can be readily and firmly securedin its adjusted position without applying excessive power to the nut.This bolt is designed to be set in the proper position to connect withthe longitudinally adjusting devices when the lower end of thecutting-bit is within itsproper range of movement relatively to thethroat of the plane-stock. When the cuttingbit is shortened up by wearand repeated grinding, so as not to have the proper range v of movementrelatively to the throat,'the bolt central longitudinal slotwith'adjacent smooth surfaces on one broad side of the said bit, androughened surfaces adjacent to the said slot on the opposite broad sideof the said bit and the non-rotating bolt fitted to the said slotandprovided with means for being connected with/thelongitudinally-adjusting devices for JAMES SHEPARD, SHEFFIELD I-I. CARKE.

